Malicious PDF — malware analysis report

Static analysis result for SHA-256 029e08ef7a814f39…

MALICIOUS

PDF

84.4 KB Created: 2021-09-11 08:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4fca467abea32d9698684a87f6683e74 SHA-1: 393385096bd24cec459783ecc07feec8a8d76f3e SHA-256: 029e08ef7a814f3932dfa3a1d62b068625c5077e002761fdc835bb673275de30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that point to various websites, many of which appear to be compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URI heuristics and link farm patterns suggests the document's primary purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://catamma.ru/uplcv?utm_term=trojan+war+mod PDF link annotation
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16131b35a310b3---11385840849.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea4d6f0623---giluf.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/27162077889.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/34967036674.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/83020678686.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613297e489046---26908438911.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/ragovifugovub.pdfIn PDF document text
    • https://pastravariaizvoarelebratiei.ro/images/file/44179654723.pdfIn PDF document text
    • http://studiotecnicomaglio.it/userfiles/files/10438472032.pdfIn PDF document text
    • http://canadianartistic.com/userfiles/file/55814226901.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139919867582---risano.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/45348854590.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/51865803249.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/dd7aeba5837db440a4ac5a7e880d0e2f/51592334740.pdfIn PDF document text
    • http://mail-business.ru/uploads/file/43692682279.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/sebeneresafovuxuvigite.pdfIn PDF document text
    • http://rrbrentacars.com/files/others/jifawolaxepibokip.pdfIn PDF document text
    • http://pooq-design.com/app/webroot/fckfiles/file/60706792721.pdfIn PDF document text
    • http://mimarkamilozkartal.com/userfiles/files/88471022557.pdfIn PDF document text
    • https://jagominum.com/contents/files/82443375806.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161314e5f9d3cb---30782701086.pdfIn PDF document text
    • https://ka-base.no/images_students/files/27615239530.pdfIn PDF document text
    • https://playworkspartnership.ca/sites/default/files/file/jopubutixaxexajalobikosa.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613521a7d9ed6---menomububafik.pdfIn PDF document text
    • http://smm-mm.com/uploads/news_file/webagubidipepovawezutajix.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE71D 10052 bytes
SHA-256: d29de954cb60441d10114d16f4518acc69980fd78ebd0aac6d8a6d8a87ea9f09
font_01_sfnt_off0000fd6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6F 18156 bytes
SHA-256: 53db256e45916d80ec9760bc870e257e7edbdc50316e8cdb54d6bec8518fbb70
font_02_sfnt_off00012bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1